|Channel|Definition|Organisation|Ownership|Notes|
|---|---|---|---|---|
|ABC1|HD|Australian Broadcasting Corporation|Government||
|ABC2|SD|Australian Broadcasting Corporation|Government||
|ABC3|SD|Australian Broadcasting Commission|Government||
|ABC News 24|HD|Australian Broadcasting Commission|Government||
|SBS One|SD|Special Broadcasting Service|Government|Simulcast in high definition on SBS HD|
|SBS Two|SD|Special Broadcasting Service|Government||
|7|SD|Seven Queensland|Private|Regional affiliate of the Seven Network in Brisbane|
|7Two|SD|Seven Network|Private||
|7mate|SD|Seven Network|Private||
|9|SD|WIN Television|Private|Regional affiliate of the Nine Network in Brisbane|
|Nine HD|HD|Nine Network|Private||
|GO|SD|Nine Network|Private||
|GEM|SD|Nine Network|Private||
|10|SD|Southern Cross Ten|Private|Regional affiliate of Network Ten|
|One HD|HD|Network Ten|Private||
|Eleven|SD|Network Ten|Private||

Question: how many channels are in hd?
Answer: 4